Question: What is the solubility of propane at a temperature of 68.0?
Paraphrase: Which temperature propane the solubility of 68.0?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q131189 p:P2177 ?s . ?s ps:P2177 ?obj . ?s pq:P2076 ?x filter(contains(?x , '68.0')) }